CVE-2025-40067 (GCVE-0-2025-40067)
Vulnerability from cvelistv5
Published
2025-10-28 11:48
Modified
2025-10-28 11:48
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: reject index allocation if $BITMAP is empty but blocks exist Index allocation requires at least one bit in the $BITMAP attribute to track usage of index entries. If the bitmap is empty while index blocks are already present, this reflects on-disk corruption. syzbot triggered this condition using a malformed NTFS image. During a rename() operation involving a long filename (which spans multiple index entries), the empty bitmap allowed the name to be added without valid tracking. Subsequent deletion of the original entry failed with -ENOENT, due to unexpected index state. Reject such cases by verifying that the bitmap is not empty when index blocks exist.
References
Impacted products
Vendor Product Version
Linux Linux Version: b35a50d639ca5259466ef5fea85529bb4fb17d5b
Version: 3ed2cc6a6e93fbeb8c0cafce1e7fb1f64a331dcc
Version: d99208b91933fd2a58ed9ed321af07dacd06ddc3
Version: d99208b91933fd2a58ed9ed321af07dacd06ddc3
Version: 358d4f821c03add421a4c49290538a705852ccf1
Version: a285395020780adac1ffbc844069c3d700bf007a
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/ntfs3/index.c"
          ],
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          ],
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          "vendor": "Linux",
          "versions": [
            {
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              "version": "6.17"
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.17.3",
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            },
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              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.18-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.112",
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              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: reject index allocation if $BITMAP is empty but blocks exist\n\nIndex allocation requires at least one bit in the $BITMAP attribute to\ntrack usage of index entries. If the bitmap is empty while index blocks\nare already present, this reflects on-disk corruption.\n\nsyzbot triggered this condition using a malformed NTFS image. During a\nrename() operation involving a long filename (which spans multiple\nindex entries), the empty bitmap allowed the name to be added without\nvalid tracking. Subsequent deletion of the original entry failed with\n-ENOENT, due to unexpected index state.\n\nReject such cases by verifying that the bitmap is not empty when index\nblocks exist."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-10-28T11:48:37.034Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/978aac54e93ea35aab20b32ae393d3d33964e7ae"
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        },
        {
          "url": "https://git.kernel.org/stable/c/0dc7117da8f92dd5fe077d712a756eccbe377d40"
        }
      ],
      "title": "fs/ntfs3: reject index allocation if $BITMAP is empty but blocks exist",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-40067",
    "datePublished": "2025-10-28T11:48:37.034Z",
    "dateReserved": "2025-04-16T07:20:57.159Z",
    "dateUpdated": "2025-10-28T11:48:37.034Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-40067\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-10-28T12:15:41.167\",\"lastModified\":\"2025-10-30T15:05:32.197\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nfs/ntfs3: reject index allocation if $BITMAP is empty but blocks exist\\n\\nIndex allocation requires at least one bit in the $BITMAP attribute to\\ntrack usage of index entries. If the bitmap is empty while index blocks\\nare already present, this reflects on-disk corruption.\\n\\nsyzbot triggered this condition using a malformed NTFS image. During a\\nrename() operation involving a long filename (which spans multiple\\nindex entries), the empty bitmap allowed the name to be added without\\nvalid tracking. Subsequent deletion of the original entry failed with\\n-ENOENT, due to unexpected index state.\\n\\nReject such cases by verifying that the bitmap is not empty when index\\nblocks exist.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/039ddf353cc33f6546a87ec1ac3210637d714bec\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/0dc7117da8f92dd5fe077d712a756eccbe377d40\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/978aac54e93ea35aab20b32ae393d3d33964e7ae\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/be66551da203862c689c12e1d35ce87217c017c1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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